This started yesterday and I'm just getting a little uneasy about it. I've been drinking a lot of water (drank about 8 glasses today, glasses that are about 16oz. each). I still feel like I need to drink more water. The weird part is I am hardly urinating at all. I don't feel like I need to go very often and when I do finally go it is very little, probably about a tenth of what I usually go.

Maybe you are dehydrated. Have you been working out alot or in the hot sun? I actually got this way in the mountains. You may want to get checked out. Try not to be alarmed.

I actually haven't been as active lately due to an ankle injury. I went outside, but only for maybe a half hour and it's not hot here. Just mostly confused I guess. Usually I urinate pretty frequently so it's just unusual.

not urinating - sounds like something dangerous - or potentially life-threatening. the urine you do pass? is it dark or light? - Do you feel bloated if you are not passing urine - have you had diarrhea recently. Check your blood pressure ( you may have created a incredible hypertensive state) also check your pulse, it can indicate dehydration if it is fast.

you may be borderline hypoxic too. that is something that can kill you.